What we know about Google ABC ranking signals: myth, reality and SEO implications

Over the last few years, the SEO community has been consistently worried about changes in algorithms and how Google assesses and ranks its search results. One of the latest issues and topics of debate has been the revelation of the so-called ABC ranking signals – a set of internal signals, apparently sourced from Google documents, that would influence the way web pages are ranked.

So what are these ABC signals? Are they real? How do they affect SEO and website improvement? In this article, we will look into what we know, the rumors, and the effect these signals could have on digital marketing plans.

What are ABC signals?

The phrase «ABC Ranking Signals» comes from a leak linked to Google, which included internal papers from the parent company Alphabet Inc. (thus the name «ABC,» which is Alphabet’s stock symbol). The papers were examined by SEO analysts and experts, and some of them indicated that Google uses many more signals than those known to everyone to decide a page’s ranking in search results.

These signals cover a wide variety of factors, such as user actions, author’s background, brand reputation, click data, how often content is updated, and other less-known metrics.

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How did this information come about?

In the first part of 2024, thousands of internal documents about Google’s search system were shared on GitHub and other online platforms. Some experts who looked into these documents – like Rand Fishkin and Mike King – have suggested that they could provide insight into the signals Google utilizes in its systems.

Based on these documents, the system would involve thousands of «features» or «aspects» for each document (meaning each web page). These features can be mixed in different ways and can be turned on or off depending on the situation of the query.

Examples of signals from ABC documents

While Google has not directly confirmed the authenticity or use of these signals, the documents reviewed mention a number of factors that could influence rankings:

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1. Clicks and behavioral data

• It is suggested that Google may use data such as click-through rate (CTR)time spent on the page e pogo-attachment (quickly return to the search page) as indirect signals of quality.

• This contradicts the official position of Google, which has stated several times that it does not use user behavior as a direct signal, due to the risks of manipulation.

2. Author’s story (author’s vectors)

• Author vectors are mentioned, suggesting that Google may also rank individual authors based on their track record and reputation.
• This has to do with initiative EAT (Experience, Expertise, Authoritativeness, Trustworthiness), where the author becomes a central component in the evaluation of the content.

3. Site Authority and Quality Scores

• Evidence of authority and quality scores assigned to domains were found, similar to what SEOs have long called «Domain Authority» (although Google denies using this term).
• The documents also talk about «site focus», i.e. the evaluation of the thematic coherence of the site.

4. Content and updating of data

• Google appears to track the frequency of content updates, the types of changes, and even the differences between historical versions of a page.
• Therefore, a site that is constantly updated with new and relevant content can have an advantage.

5. Connection information

• Connections remain an important factor. The documents suggest that Google would evaluate not only the quality and quantity of links, but also the context in which they appear, as well as «link churn» (the rate at which links change over time).

Google confirms or denies?

Following the leak of the documents, Google released an official statement stating that:

“The documents reflect outdated and incomplete information that cannot be interpreted as representative of current classification systems.”

However, industry experts have noted that many of the signals described are in line with what has been empirically observed in the search results. While these signals are not all active or used at the same time, they can provide a more complete picture of the complexity of the ranking system.

What does all this mean for SEO?

If we accept that at least some of these signals are real, then the implications for SEO will be significant. Here are some strategic indications:

1. True quality, not just optimization

It is no longer enough to optimize meta tags and keywords. Creating truly valuable, high-quality content that responds to search intent is essential.

2. The author’s reputation matters

It’s time to start signing articles with the author’s real name, creating author profiles and building reputation in your niche.

3. Focus on user experience

Optimizing UX, site speed, interactivity and reducing bounce rate are more important than ever.

4. Constant updating of contents

Static content that hasn’t been updated in years may be penalized or ignored. We recommend that you periodically review the articles and update them.

5. Diversification of connection sources

Don’t rely only on links from directories or partnerships. Build authority through natural mentions, links to valuable content, and authentic shares.

Conclusion

While Google has not explicitly confirmed the use of all disclosed “ABC” signals, the leak of these documents has raised the curtain on the complexity and sophistication of the classification system. The message is clear: Search engine optimization can no longer be separated from human optimization.

Modern SEO requires a holistic approach: from content quality, to user experience, to author reputation and behavioral dynamics. If you want to stay relevant in the post-ABC era, you need to understand not only how algorithms work, but also what Google believes is valuable to its users.